@mixin fn-has-custom-scrollbar($width: 3px, $trackColor: rgba(#000, .1), $thumbColor: rgba(#000, .3), $thumbHoverColor: rgba(#000, .6)) {

  /* width */
  &::-webkit-scrollbar {
    width: $width;
  }

  /* Track */
  &::-webkit-scrollbar-track {
    background: $trackColor;
  }

  /* Handle */
  &::-webkit-scrollbar-thumb {
    background: $thumbColor;
  }

  /* Handle on hover */
  &::-webkit-scrollbar-thumb:hover {
    background: $thumbHoverColor;
  }
}